Organic Chemistry I Lab (CHGN 223) Fall 2023 ** IMPORTANT NOTE ** In the current highly uncertain COVID-19 pandemic landscape, it is possible that the delivery mode of this course may need to be changed temporarily and with short notice. PLEASE READ THIS CAREFULLY BEFORE COMING TO LAB! LAB COURSE DETAILS Location Coolbaugh Hall (CO), Lab 324 - walk past Lab 320 and the two chemical cabinets, turn right down the hall, and it’s the last door on the right. Course Material 1) Organic Chemistry I Lab Manual by Cengage Learning 2) CSM Handouts (provided prior to the lab assignment) Notebook A lab notebook with carbon copies is required. The carbon copies are turned in to the TA for grading. The original copy is for your records, as verification that you were in attendance and did the work. In addition, you retain your notebook to prepare for the next lab. Instructors POSITION NAME OFFICE EMAIL Course Coordinator Dr. Dylan Domaille CO 162 ddomaille@mines.edu Dr. Dylan Domaille CO 162 ddomaille@mines.edu Dr. Dan Knauss CO 158 Dr. Mike McGuirk CO 160 dknauss@mines.edu cmmcguirk@mines.edu Dr. Jim Ranville CO 256 CO 121 jranvill@mines.edu yuanyang@mines.edu Lab Professors Dr. Yuan Yang Yooran Im Jesse Hudspeth Teaching Assistants Tristan Huskie Dina Liacopoulos yim@mines.edu Office hours and jessehudspeth@mines.edu location will be tristan_huskie@mines.edu provided dliacopoulos@mines.edu by the TA. spencer_smith@mines.edu Spencer Smith Lab Manager Ramona Figueroa CO 311 rfiguero@mines.edu Lab Schedule DAY Tuesday Wednesday Thursday SECTION TIME TA INSTRUCTOR A 8:00 am Spencer Smith Dr. Yang B 11:00 am Yooran Im Dr. Domaille C 2:00 pm Spencer Smith Dr. Knauss D 11:00 am Jesse Hudspeth Dr. Yang E 2:00 pm Jesse Hudspeth Dr. Ranville F 8:00 am Tristan Huskie Dr. Yang G 11:00 am Dina Liacopoulos Dr. Yang H 2:00 pm Tristan Huskie Dr. McGuirk WEEKLY ACTIVITY DATE August 29, 30, 31 EXPERIMENT Check In: Introductions, Lab Policies, Drawer and Equipment Assignments, and Expectations TECH 700: Practicing Safety in the Organic Chemistry Laboratory Safety Contract and Quiz. page 1 September 5, 6, 7 TECH 701: Measuring the Melting Points of Compounds & Mixtures, page 29 September 12, 13, 14 TECH 703: Purifying Acetanilide by Recrystallization, page 43 TECH 704: Separating Cyclohexane and Toluene by Distillation, page 57 September 19, 20, 21 September 26, 27, 28 October 3, 4, 5 October 10, 11, 12 October 16, 17 October 18, 19, 24 October 25, 26, 31 Macroscale Distillation, Part 1. Simple ONLY, page 63 TECH 705: Separating Acids and Neutral Compounds by Solvent Extraction, page 81 Microscale Extraction, page 86 SYNT 719: Br2, Brominating Alkenes, page 101 Green Chemistry, in situ Microscale (using trans-Stilbene ONLY), page 108 HANDOUT: Greener Bromination of Stilbene Greener Chemistry, in situ Br2, Better Atom Economy FALL BREAK: No Labs on Tuesday HANDOUT: Conformation of Alkylcyclohexanes (Stereochemistry) ADF Computational Exercise HANDOUT: Investigating Nucleophilic Substitution Reactions ADF Computational Exercise REAC 714: November 1, 2, 7 Studying SN1 and SN2 Reactions: Nucleophilic Substitution at Saturated Carbon, page 115 Factors Affecting the Rates of SN1 Reactions, page 125 November 8, 9, 14 REAC 712: Dehydrating Cyclohexanol, page 133 Microscale Dehydration Using a Hickman Still Assembly, page 141 November 15, 16, 21 HANDOUT: Gas Chromatography AND PARTIAL CHECK-OUT November 22, 23, 24 HOLIDAY: No Labs on Wednesday and Thursday HANDOUT: Spectroscopy - Using FTIR, MS & NMR to Determine the Identity of an Unknown Compound AND FINAL CHECK-OUT November 28, 29, 30 LAB NOTEBOOK REQUIREMENTS All experimental procedures, notes and data are to be kept in a bound notebook. The following guidelines are to be followed in order to keep an accurate laboratory record. Someone should be able to duplicate your experimental work and results by reproducing the written information in your notebook. 1. Number all pages in your laboratory notebook using permanent ink. 2. Reserve a couple of pages in the beginning of the notebook for a table of contents. 3. Make all entries in your lab notebooks in permanent ink (i.e. not water soluble). 4. Write in third person, past tense as an objective observer. 5. Do not remove any pages from your notebook. 6. Draw only one line through entry errors, and write the correct information directly below. 7. Place a single diagonal line through any blank space in your notebook. 8. Prior to lab: Read all assigned material. Complete the pre-lab assignment and turn it in to the TA at the beginning of lab. Enter the experimental objective and SDS into your lab book to be checked by the TA before lab. Points will be deducted if these entries are incomplete. A mechanism is required only for a chemical synthesis. If the pre-lab assignment is not complete upon arrival to lab, you will not be allowed to do the experiment. 9. During lab: Enter your experimental procedures (including alterations, spills, accidents, restarts, etc.), observations, data, weight of product, % yield of product, melting point range or boiling point range, product color, etc. in your notebook as you do the experiment, not before you come to lab or at a later time. Do not tape or paste anything into the notebook. Any spectra obtained from instrumental analysis should be attached to your report. 10. Sign and date your notebook at the end of each lab period. 11. OBTAIN YOUR TA’S OR INSTRUCTOR’S SIGNATURE IN YOUR NOTEBOOK AT THE END OF EACH LAB PERIOD. This provides verification that you actually attended and completed the lab. If there is no TA or Instructor signature, you will receive a zero for that lab. 12. Cheating in any form is not tolerated. All laboratory work and notebooks are to be done on an individual basis. Copying or using another student’s work will result in a FAILING GRADE for the course and for all students involved. LAB NOTEBOOK REQUIREMENTS continued It is important that you know the potential hazards associated with the compounds you are using and how to handle them safely. The labs are designed to avoid use of toxic or carcinogenic compounds, but you should be aware of the hazards ahead of time. Table 1: Example of a Table of Properties Compound MW Amt. (g/mol) Used mmol bp(°C) mp(°C) d liquids solids (g/cm3) SDS Section 7 Section 8 Section 9 Handling Protection Properties color/state 2137.0 Bromobutane 100 mL 0.92 91.2 - 1.26 VE GG, GL Benzaldehyde 106.1 200 mL 1.96 178 - 1.04 VE GG, GL Phosgene 98.9 10 mL 0.14 8 - 1.43 FH GG, GL Adipic acid 146.1 500 mg 3.4 - 153 1.35 VE GG, GL Benzene FH GG, GL Toluene VE GG, GL Ethanol VE GG, GL Nitric Acid VE GG, GL Ethyl ether VE GG, GL Use acronyms in your table for the SDS information. You do not need to write the definitions in your lab book. Specifically, look for the SDS properties of the chemicals you’ll to use for the upcoming lab. Handling: FH = Use in fume hood, VE = Use in ventilated area (on lab bench) Protection: GG = Goggles, GL = Gloves LAB GRADING Pre-lab Report (Assigned Questions).................................. 5 points Lab Notebook (Recommended Organization) Objective.................................................................. 2 points Chemical Properties Table (MSDS)......................... 3 points Mechanism for a synthesis reaction....................... 5 points Procedure................................................................. 5 points Results & Observations......................................... 15 points Conclusion.............................................................. 10 points Post-lab Report (Assigned Questions)................................ 5 points Total 50 points Tardies, Absences,............................................................... 0 points Incomplete Reports, No Report Submitted, No TA Signature in notebook to verify lab completion GENERAL LAB POLICIES Lab Attendance YOU MUST BE ON TIME FOR EACH LAB SESSION. If you come later than the start of the lab, you will NOT be admitted to the lab, and you will receive a zero grade for that lab. Continued tardiness will result in a failing grade. Pre-Lab Assignments You must have your pre-lab assignment completed and turned in to the TA at the beginning of your assigned lab period. The completion of the pre-lab assignment is our evidence that you have read the lab assignment before coming to lab and are prepared to do the experiment. If the pre-lab assignment has not been completed, you will not be allowed to perform the experiment and you will receive a zero grade for that lab. Lab Make Up No make-up labs are offered. To accommodate absences (excused or not), all student grades will be calculated after removing the lab report with the lowest score. Multiple excused absences will be handled on a case-by-case basis by determining the grade on only completed experiments. Lab Reports Lab reports must be turned in at the beginning of the lab period the following week, or when necessary, on the date requested by the TA. Lab grades will be deducted by 5 points for the first day it is late and 3 points for each day thereafter. If no report is turned in to the TA by the fifth late day, a zero grade will be given for that lab. Lab Dress All students must wear approved safety GOGGLES (not safety glasses) at ALL times – NO EXCEPTIONS. Please note that goggles are not the same as the glasses you wore in General Chemistry. Contact lenses are strongly discouraged. Gloves are required, but may be limited and furnished. The following personal protection is required: 1) at least a short-sleeved shirt that falls below the waist (no exposed skin or undergarments) or a lab coat - sheer or lace shirts are not permitted; 2) full-length pants (no holes) that cover the ankles, so no skin is showing. Not permitted are stretchy or tight-fitting pants, such as leggings, jeggings, yoga, or exercise pants, as well as sleepwear or lounge wear; 3) long socks are strongly encouraged; and 4) shoes that completely cover your ENTIRE foot. This will help to ensure your safety and avoid unnecessary exposure to hazardous chemicals. Long hair must be tied up in the back BEFORE YOU ENTER THE LAB, so it does not fall in front of the shoulders and/or obstruct your vision. Also, any watches, bracelets, necklaces, lanyards, and hats must be kept in your backpack. Listening devices and cell phones should also remain in your backpack. If you are dressed inappropriately, the TA, Lab Manager, or Instructor will ask you to leave the lab and return only when the issue has been resolved. Lab Cleanliness An important aspect of working in a lab is to be considerate of others working in that same space. Students are required to clean any and all work area(s) and equipment used, including lab benches, fume hoods, hotplates, balances, melting point apparatus, refractive index apparatus, gas chromatographs, infrared spectrometers, etc. Points will be deducted from that day’s report if you fail to clean up after yourself. Please take care of the following items before you leave the lab. 1. Never leave a chemical spill at your work space, balance, or at any other equipment or instrumentation in the lab. CLEAN IT UP IMMEDIATELY!! ASK if you are unsure of the procedure. 2. To clean the bench top, spray DI water (from the wash bottle) over your work area and wipe with paper towels to remove any chemical residue. Dispose of paper towels in the solid waste container in the waste hood. 3. Return all of your lab glassware/supplies to your assigned drawer and lock it. Label All Containers All containers containing chemicals must be labeled. Use the provided Sharpie marker to write on the clear part of the glass. Do not write on the white (or frosted) area because it is difficult to clean. The Sharpie markings are easily removed with methanol sprayed over the liquid container in the waste hood. Site for Obtaining FTIR and NMR Literature Spectra http://sdbs.db.aist.go.jp/sdbs/cgi-bin/cre_index.cgiLinks to an external site. Important Sites for Obtaining SDS Information http://www.ilpi.com/msds/Links to an external site. http://www.ilpi.com/msds/ref/chip.htmlLinks to an external site. Physical-Chemical Properties1Links to an external site. Code Letter(s) & Meaning Danger Description Symbol E ExplosiveLinks to an external site. Solid, liquid, pasty or gelatinous substances and preparations which may react exothermicallyLinks to an external site. without atmospheric oxygenLinks to an external site. thereby quickly evolving gases, and which under defined test conditions detonate, quickly deflagrateLinks to an external site. or upon heating explode when partially confined. F+ Extremely FlammableLinks to an external site. Liquid substances and preparations having an extremely low flash pointLinks to an external site. and a low boiling pointLinks to an external site. and gaseous substances and preparations which are flammableLinks to an external site. in contact with airLinks to an external site. at ambient temperatureLinks to an external site. and pressureLinks to an external site.. F Highly FlammableLinks to an external site. Substances and preparations which may become hot and finally catch fire in contact with airLinks to an external site. at ambient temperatureLinks to an external site. without any application of energy, Solid substancesLinks to an external site. and preparations which may readily catch fire after brief contact with a source of ignition and which continue to burn or to be consumed after removal of the source of ignition, Liquid substances and preparations having a very low flash pointLinks to an external site., or Substances and preparations which, in contact with waterLinks to an external site. or damp airLinks to an external site., evolve extremely flammable gasesLinks to an external site. in dangerous quantities. (none) FlammableLinks to an external site. (no Liquid substances and preparations having a symbol) low flash point.Links to an external site. O OxidizingLinks to an external site. Substances and preparations which give rise to a highly exothermicLinks to an external site. reaction in contact with other substances, particularly flammableLinks to an external site. substances. Note: Some of the letters/symbols used in these tables are also used as TSCALinks to an external site., HMISLinks to an external site. and/or DoD HMIRSLinks to an external site. codes, all of which have completely different meanings and applications! See why we dislike code systems? Health Effects1Links to an external site. Note: Some symbols appear more than once in the following table. Please study the first column carefully. Code Letter(s) & Danger Meaning Symbol Description C CorrosiveLinks to an external site. Substances and preparations which may, on contact with living tissues, destroy them. N Dangerous For The Environment Substances and preparations which, were they to enter into the environment, would present or might present an immediate or delayed danger for one or more components of the environment. Does not apply to preparations. In certain cases, some substances do not need to be labelled with the danger symbol for this category. T+ Very toxicLinks to an external site. Substances and preparations which in very low quantitiesLinks to an external site. cause death or acuteLinks to an external site. or chronicLinks to an external site. damage to health when inhaledLinks to an external site., swallowedLinks to an external site. or absorbed via the skinLinks to an external site.. T ToxicLinks to an external site. Substances and preparations which in low quantitiesLinks to an external site. cause death or acuteLinks to an external site. or chronicLinks to an external site. damage to health when inhaledLinks to an external site., swallowedLinks to an external site. or absorbed via the skinLinks to an external site.. Xi IrritantLinks to an external site. Non-corrosiveLinks to an external site. substances and preparations which, through immediate, prolonged or repeated contact with the skin or mucous membrane, may cause inflammationLinks to an external site.. Xn HarmfulLinks to an external site. Substances and preparations which may cause death or acuteLinks to an external site. or chronicLinks to an external site. damage to health when inhaledLinks to an external site., swallowedLinks to an external site. or absorbed via the skinLinks to an external site.. Substances and preparations which, if they SensitizingLinks (i.e. Xn or are inhaledLinks to an external site. or if to an external site. they penetrate the skinLinks to an external site., Xi) are capable of eliciting a reaction Xn Sensitizing by inhalationLinks to an external site. by hypersensitizationLinks to an external site. such that on further exposure to the substance or preparation, characteristic adverse effects are produced. Xi Sensitizing by skin contactLinks to an external site. CarcinogenicLinks to an external site. T - Category 1 1Links to an external site. T - Category 2 Xn - Category 3 MutagenicLinks to an external site. T - Category 1 1Links to an external site. T - Category 2 Xn - Category 3 Toxic for reproductionLinks to an external site. T - Category 1 1Links to an external site. T - Category 2 Xn - Category 3 Substances and preparations which, if they are inhaledLinks to an external (depends site. or ingestedLinks to an external site. or if on they penetrate the skinLinks to an external site., category) may induce cancerLinks to an external site. or increase its incidence Substances and preparations which, if they are inhaledLinks to an external (depends site. or ingestedLinks to an external site. or if on they penetrate the skinLinks to an external site., category) may induce inheritable genetic defectsLinks to an external site. or increase their incidence. Substances and preparations which, if they are inhaledLinks to an external site. or ingestedLinks to an external site. or if (depends they penetrate the skinLinks to an external site., on may produce or increase the incidence of noncategory) inheritable adverse effects in the progenyLinks to an external site. and/or of male or female reproductive functions or capacityLinks to an external site..